Dear all,
(please cc)
linux 5.3.N (currently .7), but also older kernels
Debian/sid
Thinkpad X260
iwlwifi 0000:04:00.0: Detected Intel(R) Dual Band Wireless AC 8260, REV=0x208
iwlwifi 0000:04:00.0: loaded firmware version 36.8fd77bb3.0 op_mode iwlmvm
In one particular location I see completely broken connection: dns does
not work (resolve does not work), ping, ssh breaks down, http breaks
down, it really sounds like a really weak connection.
The problem is that:
- the *same* laptop booted into Windows works at high speed connections
- other computers (2 Mac) around here work without problems
- mobile also connects without any problem
There are no RX/TX errors whatsoever. I tried reducing MTU, to no
effect. The only warning I see is
TCP: wlp4s0: Driver has suspect GRO implementation, TCP performance may be compromised.
wlp4s0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1400
inet 172.17.1.166 netmask 255.255.0.0 broadcast 172.17.255.255
inet6 fe80::fddc:f32e:f9cb:fded prefixlen 64 scopeid 0x20<link>
ether e4:a7:a0:66:6d:f4 txqueuelen 1000 (Ethernet)
RX packets 11164 bytes 7459009 (7.1 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 13204 bytes 3062515 (2.9 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
I am a bit at loss how to debug this, or better, whether it is possible
to get back normal connectivity?
Thanks a lot for any pointer
Norbert
--
PREINING Norbert http://www.preining.info
Accelia Inc. + IFMGA ProGuide + TU Wien + JAIST + TeX Live + Debian Dev
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